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Vulnerable Software

Vulnerability Details CVE-2026-57589

sys/kern/sysv_sem.c in OpenBSD through 7.9 has a use-after-free allowing local privilege escalation to root. This is a context switch use-after-free after tsleep in sys_semget().

Exploit prediction scoring system (EPSS) score

EPSS Score 0.001

EPSS Ranking 1.9%

CVSS Severity

CVSS v3 Score 7.4

References

Products affected by CVE-2026-57589

Openbsd » Openbsd » Version: N/A

cpe:2.3:o:openbsd:openbsd:-
Openbsd » Openbsd » Version: 2.0

cpe:2.3:o:openbsd:openbsd:2.0
Openbsd » Openbsd » Version: 2.1

cpe:2.3:o:openbsd:openbsd:2.1
Openbsd » Openbsd » Version: 2.2

cpe:2.3:o:openbsd:openbsd:2.2
Openbsd » Openbsd » Version: 2.3

cpe:2.3:o:openbsd:openbsd:2.3
Openbsd » Openbsd » Version: 2.4

cpe:2.3:o:openbsd:openbsd:2.4
Openbsd » Openbsd » Version: 2.5

cpe:2.3:o:openbsd:openbsd:2.5
Openbsd » Openbsd » Version: 2.6

cpe:2.3:o:openbsd:openbsd:2.6
Openbsd » Openbsd » Version: 2.7

cpe:2.3:o:openbsd:openbsd:2.7
Openbsd » Openbsd » Version: 2.8

cpe:2.3:o:openbsd:openbsd:2.8
Openbsd » Openbsd » Version: 2.9

cpe:2.3:o:openbsd:openbsd:2.9
Openbsd » Openbsd » Version: 3.0

cpe:2.3:o:openbsd:openbsd:3.0
Openbsd » Openbsd » Version: 3.1

cpe:2.3:o:openbsd:openbsd:3.1
Openbsd » Openbsd » Version: 3.2

cpe:2.3:o:openbsd:openbsd:3.2
Openbsd » Openbsd » Version: 3.3

cpe:2.3:o:openbsd:openbsd:3.3
Openbsd » Openbsd » Version: 3.4

cpe:2.3:o:openbsd:openbsd:3.4
Openbsd » Openbsd » Version: 3.5

cpe:2.3:o:openbsd:openbsd:3.5
Openbsd » Openbsd » Version: 3.6

cpe:2.3:o:openbsd:openbsd:3.6
Openbsd » Openbsd » Version: 3.7

cpe:2.3:o:openbsd:openbsd:3.7
Openbsd » Openbsd » Version: 3.8

cpe:2.3:o:openbsd:openbsd:3.8
Openbsd » Openbsd » Version: 3.9

cpe:2.3:o:openbsd:openbsd:3.9
Openbsd » Openbsd » Version: 4.0

cpe:2.3:o:openbsd:openbsd:4.0
Openbsd » Openbsd » Version: 4.1

cpe:2.3:o:openbsd:openbsd:4.1
Openbsd » Openbsd » Version: 4.2

cpe:2.3:o:openbsd:openbsd:4.2
Openbsd » Openbsd » Version: 4.3

cpe:2.3:o:openbsd:openbsd:4.3
Openbsd » Openbsd » Version: 4.4

cpe:2.3:o:openbsd:openbsd:4.4
Openbsd » Openbsd » Version: 4.5

cpe:2.3:o:openbsd:openbsd:4.5
Openbsd » Openbsd » Version: 4.6

cpe:2.3:o:openbsd:openbsd:4.6
Openbsd » Openbsd » Version: 4.7

cpe:2.3:o:openbsd:openbsd:4.7
Openbsd » Openbsd » Version: 4.8

cpe:2.3:o:openbsd:openbsd:4.8
Openbsd » Openbsd » Version: 4.9

cpe:2.3:o:openbsd:openbsd:4.9
Openbsd » Openbsd » Version: 5.0

cpe:2.3:o:openbsd:openbsd:5.0
Openbsd » Openbsd » Version: 5.1

cpe:2.3:o:openbsd:openbsd:5.1
Openbsd » Openbsd » Version: 5.2

cpe:2.3:o:openbsd:openbsd:5.2
Openbsd » Openbsd » Version: 5.3

cpe:2.3:o:openbsd:openbsd:5.3
Openbsd » Openbsd » Version: 5.4

cpe:2.3:o:openbsd:openbsd:5.4
Openbsd » Openbsd » Version: 5.5

cpe:2.3:o:openbsd:openbsd:5.5
Openbsd » Openbsd » Version: 5.6

cpe:2.3:o:openbsd:openbsd:5.6
Openbsd » Openbsd » Version: 5.7

cpe:2.3:o:openbsd:openbsd:5.7
Openbsd » Openbsd » Version: 5.8

cpe:2.3:o:openbsd:openbsd:5.8
Openbsd » Openbsd » Version: 5.9

cpe:2.3:o:openbsd:openbsd:5.9
Openbsd » Openbsd » Version: 6.0

cpe:2.3:o:openbsd:openbsd:6.0
Openbsd » Openbsd » Version: 6.1

cpe:2.3:o:openbsd:openbsd:6.1
Openbsd » Openbsd » Version: 6.2

cpe:2.3:o:openbsd:openbsd:6.2
Openbsd » Openbsd » Version: 6.3

cpe:2.3:o:openbsd:openbsd:6.3
Openbsd » Openbsd » Version: 6.4

cpe:2.3:o:openbsd:openbsd:6.4
Openbsd » Openbsd » Version: 6.5

cpe:2.3:o:openbsd:openbsd:6.5
Openbsd » Openbsd » Version: 6.6

cpe:2.3:o:openbsd:openbsd:6.6
Openbsd » Openbsd » Version: 6.7

cpe:2.3:o:openbsd:openbsd:6.7
Openbsd » Openbsd » Version: 6.9

cpe:2.3:o:openbsd:openbsd:6.9
Openbsd » Openbsd » Version: 7.0

cpe:2.3:o:openbsd:openbsd:7.0
Openbsd » Openbsd » Version: 7.1

cpe:2.3:o:openbsd:openbsd:7.1
Openbsd » Openbsd » Version: 7.2

cpe:2.3:o:openbsd:openbsd:7.2
Openbsd » Openbsd » Version: 7.3

cpe:2.3:o:openbsd:openbsd:7.3
Openbsd » Openbsd » Version: 7.4

cpe:2.3:o:openbsd:openbsd:7.4
Openbsd » Openbsd » Version: 7.5

cpe:2.3:o:openbsd:openbsd:7.5
Openbsd » Openbsd » Version: 7.6

cpe:2.3:o:openbsd:openbsd:7.6

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-57589

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